Slotting tool



May 28, 1929. F, W, QQEBBEL 1,714,570

SLOTW ING TOOT.

Filed JanA 16, 1926 Patented May 28, 1929.

UNITED STATES PATENT OFFICE.

FREDERICK W. ROEBBEL, OF ST. LOUIS, MISSOURI, ASSIGNOR TO COMMONWEALTHSTEEL COMPANY, OF ST. LOUIS, MISSOURIy A CORPORATION OF NEW JERSEY.

SLOTTING TOOL.

Application filed January 16, 1926.

My invention relates to machine tools and consists in an improvedconstruction and arrangement of a reciprocating Atool adapted to be usedon plane-rs, shaj'iers an.. slotters, or other tools using arecijin'oeating motion.

The main object ot my invention is to provide a tool which may operatesimultaneously on spaced surfaces and particularly surfaces which facein different directions. This makes possible the more rapid andelfective operation of the machine to which my tool is applied.

An additional object of? my invention is to provideiior shifting of thetool te ditferent angles about the axis oi its movement so as to permitthe tool to successively cut surfaces at angles to cach other withoutother adjustment oilE the machine.

In the accompanying drawings, I illustrate my invention as applied to aslotting machine and operating upon the pedestals of a car truck frame,and in these drawings- Figure l is a front elevation oi a shittingmachine showing the truck frame mounted thereon and my cutting tool inoperative position.

Iiigure 2 is a side elevation of the structure shown in Figure l.

Figure 3 is an enlarged detail ot the tool as seen in Figure 2 and alsoshowing a portion ot the pedestal being operated upon.

Figure 4i is a side view of the parts shown in. Figure Figure 5 is abottom view of the parts Ishown in Figure 3.

Figure 6 is a detail of the cutters and their mountings similar to thatshown in Figure 3 but drawn on a still largerscale.

iigure 7 is a vertical transverse section through a cutting tool andillustrates a modification of my invention.

Figure 8 is a side view of the tool shown in Figure Figure 9 is a bottomview of the body ot the tool shown in Figures 7 and 8 and takensubstantially on the line 5)-9 of Figure 8.

Figure 10 illustrates the use of the tool as an ordinary cutting tooladapted to make a single cut with each stroke.

Figure 11 illustrates another moditication oi my invention showing thetool cutters shaped to operate on two parallel surfaces Atar-in in thesame direction.

semi No. 81.800.

The machine 1 may be of any ordinary slotter construction and iorms nopart oi my present invention. It will be und nstood that the machine isadapted to provide vertical reciprocal movement of a rack 2 terminatingin a portion 3 adapted to receive the tapered shank 4 of a cutting tool.the body of which is indicated at 5.

I show a ear truck frame G mounted on the base of the machine l ininverted position. This frame is a one-piece casting with integralpedestals 7 and is of familiar form. It is necessary that the opposingfacci-1 of the pedestal jaws be machined parallel with each other and myimproved tool enables this to be done quickly and accurately.

A cutter' holding member S is detachably secured to the lower end of thetool body 5 by means of a stud 9 and nut l0. The lower face of body hastwo grooves li extending at right angles to each other and the upperface of member 2 has two corresponding ribs l2 whereby when the niemberis assembled with the body and nut l() is tightened, the two parts areheld againsty relative rotation about their axis. but by loosening` nut10 the cutter holding portion of the tool may be easily shifted. ninetydegrees in a horizontal plane and thereby adapted to plane surfaces atninety ifiegrees to the original surfaces. Obviouslyv the angle ofchange may be varied by suite-ble variations in the slots and ribs orthe la may be .increased in number so as to care oi. more than twopositions ot the ioni.

The lower tace of member 8 has a deep recess extending' transversely ofthe member and in this recess I insert cutter holding elements l?) whichare pivoteii aiY lt near their upper inner corners to the sides of therecess and may swing downwardljT about their pivots from the positionshown in full lines in Figure 3 to the position shown by doteand-dashlin-'fs in Figure F3, the, lower inner corners ot' the elements ,heing`beveled to accommodate such movement. It will be understood that thisposition of elements taken when the tool is withdrawn after the end of acutting stroke. On the downward stroke, the upper face of the cutter ispositively eng 'ed by 'the bottom of the recess. Cutter bits l5 areinserted in the lower portions ot' elements and may be individuallyadjusted, resharpened and removed as necessary, each being lit) retainedby its individual set screw 3l. Cutters l5 are shown in the preferredeinbodiment ot my invention as having their cutting trices or edgesIextizinding in opposite directions to engage oppositely facing suaces onthe truck pciflestal jaws.

Eleii'ients I3 are provided with laterally extern-ling studs lo on whichare provided spring seating blocks I7 and a coil spring i8 iscoii'ipressed between the pair ot blocks on the saine side of the tool.These cuttiiig tools are yieldingiy mounted to prevent the tools troniundue draggiiigpri fire on the return stroke which would dull tirecutting edge. rl[he springs rei; .rn the cutting tools to cuttingposition at the end of the return stroke. ln the moditicatioi shown inFigures 7, 8, and t) I provide a sleeve I9 which surrounds the tool body2O and its lower end has a flange 2l which provides a wider sup* portingsurface toi: the upper tace ot the cutter holding element 22 which shownas intending laterally for a subslai'itial distance beyond the side otlthe tool body. Studs 223 hold sleeve il) against dropping o the body otthe tool when member 22 is removed. The upper portion oit body 2t) isprovided with an annular ilange 2liwhich engages the upper end oilVsleeve 19 and the lower tace of the machine element 3, thus providing arigid brace lior the ci'ltter holdiiig element 22. One side olf thesleeve 19 will have a suitable opening 25 provided therein to per` mitaccess to nut 26.

Il. it is desircifl to use the tool in the ordinary iiianner, element tlor 22 may be removed and an ordinary cutting tool 27 may be inserted inthe body 28 as indicated in Figure l0.

In Figure ll I .illustrate a inodilication of my inii'ention in whichthe cutters 29 are pivotally mounted in a cutter holding elcnient 3l)similarly to the arrangement shown in Iiigures 3 to S but the cuttersare bent at right angles Vin such manner that their cutting edges orlaces are parallel although widely spaced :troni each other. In thisligure the tool is shown as ope 'ating on the side t'aces ot the spacedpedestal jaws 7 of the truck frame.

bviously numerous inodilications in the details oi my ini'ention may bemade withn out departing :trom the spirit thereof and I conteinjilatethe exclusive use or" such changes as are included iii the scope ot' theYfollowing claims.

I claim:

l. In a tool olf the class described, a body, cutters mounted on andextendiiig laterally from said body, and a sleeve surrounding said bodyand affording an axially :tacing bearing tor the portions o1 saidcutters projecting beyond the sides oit said body.

2. In a tool of the class described, a body having a downwardly facingshoulder near .its upper end, cutters extending laterally trom the lowerportion ot' said body, and a removable sleeve surrounding said body andseated against said shoulder and iiiroviding a bearing :tor theprojecting portions ot said critters.

3. In a reciprocal cutting tool, a body, a ijilurality or" cutterholders mounted on said body so as to pivot in the direction or"reciprocal movement, cutters in said holders, mea-ns limiting pivotingoic said holders in one direction about said pivots, the cutting edgesor' said cutters facing in saine direction, and yielding means mountedon the sides oli said holders for simultaneously thrust-ing said cuttersinto operating position.

Al. In a tool ot the class described, a body having` a vertical recessextending transversely thereof and a plurality of alined cutter memberspivoted in said recess so as to swine' downwardly from a. normalposition but positively held against upward movement 'troni saidposition, their cutting portions extending outwardly of opposite endsot' said recess and facing in the saine direction, and a spring mountedon and conipressed between said cutter members below their pivots andoutside ot said body and yiehlingly thrusting` said cutters into normalposition.

In a tool ot the class described, a body having a vertical recess in itsbottoni and extending from side to side of the body, a plurality ofcutter holders located in said recess with aligned cutter receivingportions opening outwardly of the recess, elements pivoting the upperinner corners of said holders to the sides of lsaid recess, the upperouter corners ot said holders being adapted to bear against the top ofsaid recess, and a spring mounted on and compressed between said holdersbelow said pivots tor thrusting cutters mounted in said holders intocutting position.

G. In a tool of the class described, a body having a vertical recess inits bottom and extending iti-om side to side of the body, a plurality ofcutter holders located in said recess with aligned cutter receivingportions opening outwardly ot the recess, elements pivoting the upperinner corners of said holders to the sides of said recess, the upperouter corners of said holders being adapted to bear against the top otsaid recess and the lower inner corners of said holders being bevelledto permit pivotal movement downwardly of said cutters trom suchconnecting position, and a spring mounted on and compressed between saidholders below said body ;t'or thrusting cutters mounted in said holdersinto cutting position.

In testimony whereof I hereunto affix my signature this 12th day ofJanuary, 1926.

F. W. ROEBBEL.

